Medical biologists are researching a fertility disorder that prevents developing offspring from forming the structures they need to maintain nourishment and continue development. therefore, development ceases early during gestation. what is the final stage of development that these offspring could reach before development stops?

zygote
blastocyst
fetus
gametes

The correct answer would be blastocyst.

A blastocyst is a developmental stage in which blastula develops into a blastocyst. The blastocyst has a specific cavity termed as blastocoele and a mass of cell termed as inner cell mass.

The cells of inner cell mass differentiate to form the three layers of an embryo which then give rise to different tissues and organs.

Thus, the blastocyst is the last stage on which medical biologists should research on.

from my research i have to the conclusion that decomposers, such as fungi, bacteria and invertebrates, play a critical role in nutrient cycling and without them the earth's ecosystem may not support life as we know it. elements such as carbon, nitrogen and phosphorus exist in limited amounts on earth, although huge amounts of carbon are being released into the atmosphere from underground sources now by humans. it is still extremely important that other nutrients be retained by the process of re-use. decomposers are organisms that are able to chemically break down dead material and make these elements available for use by other organisms. without this breakdown of dead material, dead bodies would pile up. so decomposers also play a role in clean up also. without them, life might not continue as we know it and dead material would overwhelm the earth.    

i'm gonna put a couple so you can chose from

explanation:

if you know the fur color of the offspring mice, you can use the ratios to identify the genotypes of the parents.

if either parent mouse passes a dominant allele, the offspring will have black fur.

if the parental mice has two different fur color (i.e white and black) , the color of the offspring's fur would be either black, white, or the combination of both (grey)

hope this : )